Sonny Munroe is starting to adjust to her new life in Hollywood, but when her best friend from back home reminds her that she's missing the prom, Sonny is totally bummed. Then Sonny has an idea: create a prom scene on the set of So Random! The cast thinks it's an awesome plan—even Sonny's rival, Tawni Hart, who agrees as long as she gets to be the prom queen.